Try running the following example - it should help clear up what is
going on:
class Base:
def __init__(self):
print "Initializing base"
def shouldBeImplemented(self):
raise NotImplementedError
def hasDefaultImplementation(self):
print "Wey Hey!"
class A(Base):
def shouldBeImplemented(self):
print "Has been implemented!"
class B(Base):
def __init__(self):
Base.__init__(self)
print 'Initializing B'
class C(Base):
def __init__(self):
print "Initializing C"
def hasDefaultImplementation(self):
print "Boo Hoo!"
base = Base()
print "\n------- A --------"
a = A()
a.shouldBeImplemented()
print "\n------- B --------"
b = B()
b.hasDefaultImplementation()
print "\n------- C --------"
c = C()
c.hasDefaultImplementation()
c.shouldBeImplemented()
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